/* rain.c -- finds yearly totals, yearly average, and monthly average for
 * serveral years of rainfall data */
#include <stdio.h>
#define MONTHS 12
#define YEARS 5
int main(void) {
  // initializing rainfall data for 2010-2014
  const float rain[YEARS][MONTHS] = {
      {4.3, 4.3, 4.3, 3.0, 2.0, 1.2, 0.2, 0.2, 0.4, 2.4, 3.5, 6.6},
      {8.5, 8.2, 1.2, 1.6, 2.4, 0.0, 5.2, 0.9, 0.3, 0.9, 1.4, 7.3},
      {9.1, 8.5, 6.7, 4.3, 2.1, 0.8, 0.2, 0.2, 1.1, 2.3, 6.1, 8.4},
      {7.2, 9.9, 8.4, 3.3, 1.2, 0.8, 0.4, 0.0, 0.6, 1.7, 4.3, 6.2},
      {7.6, 5.6, 3.8, 2.8, 3.8, 0.2, 0.0, 0.0, 0.0, 1.3, 2.6, 5.2}};
  int year, month;
  float subtot, total;

  printf(" YEAR		RAINFALL (inches)\n");
  for (year = 0, total = 0; year < YEARS;
       year++) {  // for each year, sum rainfall for each month
    for (month = 0, subtot = 0; month < MONTHS; month++) {
      subtot += rain[year][month];
    }
    printf("%5d %15.1f\n", 2010 + year, subtot);
    total += subtot;  // total for all years
  }

  printf("\nThe yearly average is %.1f inches.\n\n", total / YEARS);
  printf("MONTHLY AVERAHES:\n\n");
  printf(" Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec\n");

  for (month = 0; month < MONTHS;
       month++) {  // for each month, sum rainfall over years
    for (year = 0, subtot = 0; year < YEARS; year++) {
      subtot += rain[year][month];
    }
    printf("%4.1f", subtot / YEARS);
  }
  printf("\n");  // also putchar('\n');

  return 0;
}